Letter-opener



FIG. 1 is a front elevational view of a letter-opener showing my new design;

FIG. 2 is a side elevational view thereof, the opposite side being substantially a mirror image thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a letter-opener, substantially as shown and described. 